lib/liblwres/include/lwres/async.h

   1 /*
   2  * Copyright (C) 2003  Michael Richardson
   3  * Contributed by Michael Richardson <mcr@freeswan.org> while working
   4  * on the Linux FreeS/WAN project in 2003.
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
  11  * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
  12  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
  13  * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
  14  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
  15  * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
  16  * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
  17  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 /* $Id: async.h,v 1.1 2004/03/15 20:35:25 as Exp $ */
  21
  22 #ifndef LWRES_ASYNC_H
  23 #define LWRES_ASYNC_H 1
  24
  25 #include <lwres/lwres.h>
  26
  27 /*
  28  * support for asynchronous requests to lwres port
  29  */
  30 struct lwres_async_state {
  31         struct lwres_async_state *next;
  32
  33         lwres_buffer_t            b_in, b_out;
  34         lwres_uint32_t            serial;
  35         int                       opcode;
  36
  37         int (*callback)(void *uctx, struct rrsetinfo *res);
  38         void *uctx;
  39 };
  40
  41
  42
  43 /*
  44  * The calls for asynchronous requests.
  45  */
  46
  47 int lwres_async_init(lwres_context_t **pctx);
  48
  49 int lwres_getrrsetbyname_init(const char *hostname, unsigned int rdclass,
  50                               unsigned int rdtype, unsigned int flags,
  51                               lwres_context_t *ctx,
  52                               struct lwres_async_state *las);
  53
  54 int lwres_getrrsetbyname_xmit(lwres_context_t *ctx,
  55                               struct lwres_async_state *las);
  56
  57 unsigned long lwres_async_timeout(lwres_context_t *ctx);
  58
  59 int lwres_async_fd(lwres_context_t *ctx);
  60
  61 int lwres_getrrsetbyname_read(struct lwres_async_state **plas,
  62                               lwres_context_t *ctx,
  63                               struct rrsetinfo **res);
  64
  65 int lwres_getrrsetbyname_async(const char *hostname, unsigned int rdclass,
  66                                unsigned int rdtype, unsigned int flags,
  67                                struct rrsetinfo **res);
  68
  69 #endif /* LWRES_ASYNC_H */
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